[Neuronal organization of the myenteric plexus (Auerbach) in the small intestine of the pig. I. Type I neurons].

Examinations were done in silver impregnated strips of the small intestine of the pig. As a result of these findings we can state: 1. The real type I-neurons (according to Dogiel) are an integrated part (besides four other neuron-types) of the neuronal organization of the plexus myentericus (Auerbach). 2. There are uniaxonal multidendritic (short-dendritic) neurons, organized in aggregates as a rule. They are mainly found in the peripheric and oral parts of ganglia. The higher portion of neurits runs orally. These neurits form a type specific ascending tract. 3. The hitherto existing ideas on the neuronal organization of the intestinal nervous system are seriously doubted.